No. Since the blown channels have no input or output, they are out of the pwr. supply loop when wattage & current are supplied to the working channels.
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Thanks for the responses. Of course, I'm dissapointed to hear that I can't enhance the performance of the active channels. Would have been a nice upside. As to the fuses, I only wish it was that simple. The first thing I did was check the fuses and replace them. Unfortunately, the first two channels in the power line seem to be dead.
I would think it best to disconnect the power supplies from the blown channels. There are several different sections to a power amplifier channel and some of them are probably still working - let's assume the power output section is out for a second - and the working sections that are active will draw power. If part of the circuit is damaged, it isn't good for the working part to be operating into a non working section - just my opinion. I would disconnect the non working sections if it were me.